Fix trailing space. (#94)

Author: laurenzlong

src/cloud-functions.ts

@@ -73,7 +73,7 @@ export interface MakeCloudFunctionArgs<EventData> {
   after?: (raw: Event<any>) => void;
 }
 
-function _makeParams(event: Event<any>, triggerResource: string): { [option: string]: any } {  
+function _makeParams(event: Event<any>, triggerResource: string): { [option: string]: any } {
   if (!event.resource) { // In unit testing, "resource" may not be populated for a test event.
     return event.params || {};
   }